<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <ul class="list" id="list">
        <li class="li1">l1</li>
        <li>l2</li>
        <li>l3</li>
        <li>l4</li>
    </ul>
    <div class="box1">
        box1
    </div>
    <script src='./tool.js'></script>
    <script>
        _.on('click', 'li', function (event) {
            this.innerHTML += 'hello'
        })
        _.q('.box1,.li1').style('color', 'red').style('fontSize', '34px').style('background', 'rgba(0,0,0,0.5)')
    </script>
</body>

</html>